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Historical scientific model of the atom
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- A plum pudding model is a historical scientific model of the atom that was proposed by J.J. Thomson in 1904, shortly after he discovered the electron. The model tried to explain two properties of atoms that were known at that time: electrons are negatively charged particles, and atoms have no net electric charge.
www.electrical4u.com/thomsons-plum-pudding-model/The Plum Pudding Model: An Early Attempt to Explain the Atom
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The plum pudding model was the first scientific model of the atom to describe an internal structure. It was first proposed by J. J. Thomson in 1904 following his discovery of the electron in 1897, and was rendered obsolete by Ernest Rutherford 's discovery of the atomic nucleus in 1911.
- Thomson Model Introduction
- Table of Contents
- Postulates of Thomson’s Atomic Model
- Limitations of Thomson’s Atomic Model
Thomson atomic modelwas proposed by William Thomson in the year 1900. This model explained the description of an inner structure of the atom theoretically. It was strongly supported by Sir Joseph Thomson, who had discovered the electron earlier. During cathode ray tube experiment, a negatively charged particle was discovered by J.J. Thomson. This e...
Postulate 1: An atom consists of a positively charged sphere with electrons embedded in it Postulate 2: An atom as a whole is electrically neutral because the negative and positive charges are equal in magnitude Thomson atomic model is compared to watermelon. Where he considered: 1. Watermelon seeds as negatively charged particles 2. The red part o...
It failed to explain the stability of an atom because his model of atom failed to explain how a positive charge holds the negatively charged electrons in an atom. Therefore, This theory also failed...Thomson’s model failed to explain the scattering of alpha particles by thin metal foilsNo experimental evidence in its support- 32 sec
Popularly known as the plum pudding model, it had to be abandoned (1911) on both theoretical and experimental grounds in favour of the Rutherford atomic model, in which the electrons describe orbits about a tiny positive nucleus.
- The Editors of Encyclopaedia Britannica
Jan 19, 2016 · Though defunct by modern standards, the Plum Pudding Model represents an important step in the development of atomic theory. Not only did it incorporate new discoveries, such as the existence...
After discovering the electron in 1897, J J Thomson proposed that the atom looked like a plum pudding close plum pudding model The scientific idea that an atom is a sphere of positive...
In Thomson's plum pudding model of the atom, the electrons were embedded in a uniform sphere of positive charge, like blueberries stuck into a muffin. The positive matter was thought to be jelly-like, or similar to a thick soup.
